/*
 * Copyright 2011-2025 GatlingCorp (https://gatling.io)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.gatling.core.action

import io.gatling.commons.util.Clock
import io.gatling.commons.validation.{ Failure, Success }
import io.gatling.core.session.{ Expression, Session }
import io.gatling.core.stats.StatsEngine
import io.gatling.core.util.NameGen

private final class GroupStart(groupName: Expression[String], override val statsEngine: StatsEngine, override val clock: Clock, override val next: Action)
    extends ExitableAction
    with NameGen {
  override val name: String = genName("groupStart")

  override def execute(session: Session): Unit = {
    val group = groupName(session) match {
      case Success(value) => value
      case Failure(message) =>
        logger.error(s"Failed to resolve name of group '$name': $message")
        s"$name (name resolution failure)"
    }

    val newSession = session.enterGroup(group, clock.nowMillis)
    // [e]
    //
    //
    // [e]
    next ! newSession
  }
}
